@misc{indiciae308580de9b37,
  title = {Bibliography of North American geology, 1969},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1972},
  doi = {10.3133/b1269},
  url = {https://pubs.usgs.gov/publication/b1269},
  note = {Source identifier: b1269}
}